Refrigerator shelf



FIG. 1 is a front, top, left perspective view of the refrigerator shelf;

FIG. 2 is a bottom view thereof;

FIG. 3 is a bottom, rear, right perspective view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a left-side view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is right-side view thereof. 

The ornamental design for a refrigerator shelf, as shown and described. 